Usable end-to-end encryption

End-to-end email encryption is still ignored by almost all users.
The mails are left in the clear in the mailboxes of the web mail
providers, where they are frequently collected by attackers and lead
to an escalation of the attack due to the sensitivity of the mail
content. We suggest a new and simplified infrastructure to protect
mail that is compatible with OpenPGP and S/MIME and relies on an
easy-to-use trust model without a central administration.